anv: enable VK_EXT_shader_stencil_export

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>

src/intel/vulkan/anv_extensions.py

@@ -112,6 +112,7 @@ EXTENSIONS = [
     Extension('VK_EXT_global_priority',                   1,
               'device->has_context_priority'),
     Extension('VK_EXT_shader_viewport_index_layer',       1, True),
+    Extension('VK_EXT_shader_stencil_export',             1, 'device->info.gen >= 9'),
 ]
 
 class VkVersion:

src/intel/vulkan/anv_pipeline.c

@@ -152,6 +152,7 @@ anv_shader_compile_to_nir(struct anv_pipeline *pipeline,
          .subgroup_quad = true,
          .subgroup_shuffle = true,
          .subgroup_vote = true,
+         .stencil_export = device->instance->physicalDevice.info.gen >= 9,
       },
    };
 

src/intel/vulkan/genX_pipeline.c

@@ -1600,6 +1600,7 @@ emit_3dstate_ps_extra(struct anv_pipeline *pipeline,
          ps.PixelShaderHasUAV = true;
 
 #if GEN_GEN >= 9
+      ps.PixelShaderComputesStencil = wm_prog_data->computed_stencil;
       ps.PixelShaderPullsBary    = wm_prog_data->pulls_bary;
       ps.InputCoverageMaskState  = wm_prog_data->uses_sample_mask ?
                                    ICMS_INNER_CONSERVATIVE : ICMS_NONE;